Michael Heffernan of San Francisco cheers on the Giants as he watches the game at Lucky Strike Lanes near AT&T park in San Francisco, Sunday October 28th, 2012.

Photo: Michael Short, Special To The Chronicle

Michael Heffernan of San Francisco cheers on the Giants as he...

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Giants fan Ronnie Gonsalvez along with others celebrate their team winning the World Series on Sunday, Oct. 28, 2012.

Photo: Mathew Sumner / Special To The Chronicle

Giants fan Ronnie Gonsalvez along with others celebrate their team...

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Giants fans screamed for their heroes during the 2010 World Series victory parade down Market Street. The 2012 version of the parade has been set for the venerable boulevard at 11 a.m. Wednesday.

Photo: Mike Kepka, The Chronicle

Giants fans screamed for their heroes during the 2010 World Series...

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After the San Francisco Giants won the World Series, Cole McKnight, 10, goes nuts at Tim Lincecum passes by during the victory parade on Market Street on Wednesday Nov. 03, 2010 in San Francisco, Calif.

Photo: Mike Kepka, The Chronicle

After the San Francisco Giants won the World Series, Cole McKnight,...

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After the San Francisco Giants won the World Series, Giants manager Bruce Bochy, holds the World Series Championship trophy as he comes down Montgomery Street during the victory parade on Wednesday Nov. 03, 2010 in San Francisco, Calif.

Photo: Mike Kepka, The Chronicle

After the San Francisco Giants won the World Series, Giants manager...

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After the San Francisco Giants won the World Series, confetti falls fall an fans as the Giants make their way in the victory parade on Wednesday Nov. 03, 2010 in San Francisco, Calif.

Photo: Mike Kepka, The Chronicle

After the San Francisco Giants won the World Series, confetti falls...

Find those beards and panda hats, giraffe heads and Lincecum wigs. And get ready for what could be one of the biggest, craziest parties in the city that knows how to party.

The Giants' victory parade will begin at the foot of Market Street at 11 a.m. Wednesday. The parade ends at Civic Center. Yes, on Halloween. The city that revels in Bay to Breakers, Halloween in the Castro, and any chance to dress up (or down) and party, will throw an orange-and-black celebration to rival all others.

Giants executives were too superstitious to have announced anything about a World Series victory parade before clinching the title. But, with a three-games-to-none lead heading into Sunday's Game 4, the situation demanded that practical concerns take precedence over fears of jinxing the team. The Giants had no choice but to begin some quiet planning.